3912128317 has 4 divisors (see below), whose sum is σ = 3917216380. Its totient is φ = 3907040256.

The previous prime is 3912128293. The next prime is 3912128321. The reversal of 3912128317 is 7138212193.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1630059876 + 2282068441 = 40374^2 + 47771^2 .

It is a cyclic number.

It is not a de Polignac number, because 3912128317 - 2¹⁵ = 3912095549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3912128357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2542878 + ... + 2544415.

It is an arithmetic number, because the mean of its divisors is an integer number (979304095).

Almost surely, 2^3912128317 is an apocalyptic number.

It is an amenable number.

3912128317 is a deficient number, since it is larger than the sum of its proper divisors (5088063).

3912128317 is an equidigital number, since it uses as much as digits as its factorization.

3912128317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5088062.

The product of its digits is 18144, while the sum is 37.

The square root of 3912128317 is about 62547.0088573387. The cubic root of 3912128317 is about 1575.6909127259.

The spelling of 3912128317 in words is "three billion, nine hundred twelve million, one hundred twenty-eight thousand, three hundred seventeen".